Adobe Illustrator's text formatting tools give you control over the text of your business flyers, presentations or Internet ads. One such tool controls text justification. This justification tool aligns text with the left, right or center of the text box, or a combination thereof. Although most users will only need one of the seven justification buttons, Illustrator offers fine-tune controls, such as setting minimum, desired and maximum values for word and letter spacing, as well as glyph scaling that controls the character width when justifying. Additionally, Illustrator offers control over single-word paragraphs, which prevents awkward formatting when applying justification better suited for paragraphs containing multiple words or sentences.

1. Press "V" to activate the Selection tool and click a text box to apply justification to all its text. Hold "Shift" and click multiple text boxes to apply formatting to more than one. Alternatively, press "T" to activate the Text tool and click within a single paragraph in a text box to apply justification to only that paragraph.

2. Click the "Text" menu and choose "Paragraph" to open the Paragraph panel.

3. Click one of the seven justification buttons at the top of the Paragraph panel. These buttons align text left, right, center or with full justification. There are four full justification buttons; the differences between them is the alignment set for the last line.

4. Click the flyout menu in the upper-right corner of the Paragraph panel and select "Justification" to open the Justification panel.

5. Enter minimum, desired and maximum values for word and letter spacing. By default, the word spacing range is set from 80 to 133 percent, which allows justification to affect the spacing between words but keep normal spacing if possible. Letter spacing is set to zero to prevent spaces from occurring in words. Glyph spacing is set to 100 percent to keep characters at their normal sizes. Click the "Single Word Justification" drop-down menu and select the justification method for paragraphs containing a single word.